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Astrophysics, Gravitation and Cosmology Seminar - "Constraints on cumulative CO emission at 1 < z < 4 from power spectrum analysis of ALMA Spectroscopic Survey (ASPECS) Large Program data"

Event Type
Seminar/Symposium
Sponsor
Department of Physics
Location
464 Loomis
Date
Feb 5, 2020   12:00 pm  
Speaker
Bade Uzgil, National Radio Astronomy Observatory
Contact
Betsy Greifenkamp
E-Mail
greifenk@illinois.edu
Views
32
Originating Calendar
Physics - Astrophysics, Relativity, and Cosmology Seminar

Obtaining an unbiased, complete census of the molecular gas content of galaxies as a function of redshift provides insight into the underlying processes that regulate the evolution of galaxies. Blind, flux-limited spectral scans, such as the ALMA Spectroscopic Survey Large Program (ASPECS LP), have targeted CO rotational transitions as molecular gas tracers to set current constraints on the evolution of cosmic molecular gas density out to z ~ 4. In parallel with the ASPECS team's efforts to extract individual CO detections from the ASPECS LP Band 3 (84-115 GHZ) data, we have performed a power spectrum analysis of the surface brightness fluctuations to measure aggregate CO emission within the survey volume. Here, I will present the results of this analysis, including an upper limit on the CO autopower spectrum and detections of cross-power with rest-frame optical emission from galaxies.

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